sorry I didn't look too closely, rings, valves and gaskets should not be more than 600 bucks or so. Plus a hundred+ for the hone and maybe K liners I'll fit them for $300. I'll strip and rebuild the whole motor for a grand or so....Have a look at Pickles, a 2012 R1200 GS, well smashed will probably go for $6-7g (I was buying bikes at auction for my business for the last 15 years) The GS will return quite a lot in spare parts. But there are always a few to chose from, you may have to wait a bit....